OEM Buick Terraza Brake Calipers

Buick Terraza Brake Calipers Parts and Q&A

• Caliper, Rear Driver Side
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  Q: How to overhaul the rear brake calipers on Buick Terraza?

  A:

  Prior to working on the rear brake caliper always take dust and fluid safety measures while understanding brake fluid impacts on paint and electronics before you begin. Take out the back brake caliper from the car system. When brake fluid escapes through the rear compartment this means owners must buy an entirely new brake caliper since the shaft seal cannot be repaired. Insert a small unwaxed tool into the brake caliper assembly to detach its dust boot seal retaining ring before draining all brake fluid. Spread a wood block inside the caliper body nearest the Piston, then apply low-pressure air through the inlet hose to push out the Piston. Sever the remaining Piston dust boot seal and take out the Piston seal from the caliper bore. Check the overall function of the parking brake system when turning the lever; avoid taking the parts apart since replacement is needed when brakes get stuck. Install brake caliper components without using abrasive materials on parts and change the entire caliper system when the caliper bore shows serious corrosion or structurally compromised areas. Minor rust or corrosion needs fine emery cleaning while total defect requires new assembly. Apply denatured alcohol to all parts including Piston bore, seal counterbore, piston, and sleeves before blowing them dry with non-oiled air filtration. Check if the caliper Piston needs replacement because of damage and replace the entire caliper assembly when the mounting holes reveal defects. Install the new Piston seal into the caliper bore and dip it in delco supreme 11 (GM P/N 12377967 or Canadian P/N 992667) or dot-3 brake fluid alternative before placement. Insert the Piston into the bore and put the new dust boot seal onto its surface before using a spanner tool to rotate the Piston clockwise until it fits properly. Put the Piston dust boot into the counterbored hole until it reaches its proper position before installing the retaining ring. Install the brake caliper on the vehicle first and then test for leaks during brake bleeding; replace the entire Piston assembly when front leaks appear beyond the dust boot seal because the seal is not repairable.
• Caliper
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  Q: How to replace the front brake calipers on Buick Terraza?

  A:

  Before replacing the front brake caliper you should check the brake fluid level in the master cylinder reservoir. Drain some fluid until it reaches the midway point between the maximum and minimum levels. Lift the vehicle and place support stands underneath. Uninstall the tire and wheel while also installing some brake wheel nuts to the hub. Position a strong c-clamp on top of the brake caliper and push the piston towards the bore until you can pull the caliper off the rotor. Use big c-clamp to push Brake Caliper Piston down as you tighten the device against Brake Pad backing until you can remove the brake caliper from its rotor position. Pull the Brake Caliper Bolt and hose out from the caliper while discarding the possible bonded copper brake hose gaskets stuck at each end. Seal the base and delivery ports of the brake caliper and hose while cleaning around their attachment points. Take off the brake caliper from its bracket by removing the bolts and inspect the brake caliper pin boots for damage. Replace damaged boots and examine the caliper pins for corrosion. Replace pins if needed. Tap the caliper bolt boots correctly before fixing the caliper to the caliper bracket. Affix the caliper bolts tightly at 54 nm (40 ft. Lbs.). Plug the removed brake hose seat before setting steel gaskets onto the brake hose and fastening the new bolt following 54 nm (40 ft. Lbs.) torque settings. Replace the rotor hub nuts first before adding the tire and wheel and lowering the vehicle. Top up the master cylinder to the right level and correctly bleed the entire brake system. Afterwards press the brake pedal with 778 nm force (175 ft. Lbs.) for ten seconds to check for leaks in the caliper assembly and hydraulic system.